package net.minecraft.command.server;

import java.util.List;
import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.command.WrongUsageException;
import net.minecraft.entity.Entity;
import net.minecraft.nbt.JsonToNBT;
import net.minecraft.nbt.NBTException;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTUtil;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.BlockPos;

public class CommandTestFor extends CommandBase {
	/**
	 * Gets the name of the command
	 */
	public String getCommandName() {
		return "testfor";
	}

	/**
	 * Return the required permission level for this command.
	 */
	public int getRequiredPermissionLevel() {
		return 2;
	}

	/**
	 * Gets the usage string for the command.
	 */
	public String getCommandUsage(ICommandSender sender) {
		return "commands.testfor.usage";
	}

	/**
	 * Callback when the command is invoked
	 */
	public void processCommand(ICommandSender sender, String[] args) throws CommandException {
		if (args.length < 1) {
			throw new WrongUsageException("commands.testfor.usage", new Object[0]);
		} else {
			Entity entity = func_175768_b(sender, args[0]);
			NBTTagCompound nbttagcompound = null;

			if (args.length >= 2) {
				try {
					nbttagcompound = JsonToNBT.getTagFromJson(buildString(args, 1));
				} catch (NBTException nbtexception) {
					throw new CommandException("commands.testfor.tagError", new Object[] { nbtexception.getMessage() });
				}
			}

			if (nbttagcompound != null) {
				NBTTagCompound nbttagcompound1 = new NBTTagCompound();
				entity.writeToNBT(nbttagcompound1);

				if (!NBTUtil.func_181123_a(nbttagcompound, nbttagcompound1, true)) {
					throw new CommandException("commands.testfor.failure", new Object[] { entity.getName() });
				}
			}

			notifyOperators(sender, this, "commands.testfor.success", new Object[] { entity.getName() });
		}
	}

	/**
	 * Return whether the specified command parameter index is a username parameter.
	 */
	public boolean isUsernameIndex(String[] args, int index) {
		return index == 0;
	}

	public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
		return args.length == 1 ? getListOfStringsMatchingLastWord(args, MinecraftServer.getServer().getAllUsernames())
				: null;
	}
}
